Apparatus for slip form production of prestressed concrete railr

Details Apparatus for slip form production of prestressed concrete railr Apparatus for slip form production of prestressed concrete railr

1997-03-27

1998-10-13

Nguyen, Khanh P.

Plastic article or earthenware shaping or treating: apparatus

Building forms or construction engineering type mold with...

Including mold charging means

425 63, 425111, 425117, 425150, 425308, 249 83, 249 86, B28B 108, B28B 714

Patent

active

058208879

ABSTRACT:
Pre-stressed concrete railroad ties are manufacture by the slip form process in the absence of mold members, other than the slip form itself. Tie casting occurs on a portable casting soffits between portable soffit anchored deadmen supporting the pre-stressed tie tensile members immediately overlying the casting soffit. Tie formation occurs with the slip form passing around and over the pre-stressed tension members. Track fastening hardware is vibrationally inserted through windows of the slip form to place the track fastening hardware to precise measured dimension along the route of slip form movement and to configure that portion of the tie adjacent the track fastening hardware. End of tie locations as well as tie batch identification are likewise marked during the slip form process. Upon cure, the ties are cut at their marked end location. Provision is made to place the track fastening hardware into high strength modular inserts which are later being modularly inserted to the tie during the slip form process.

REFERENCES:
patent: 4051216 (1977-09-01), Bratchell
patent: 4076474 (1978-02-01), Catenacci
patent: 4102957 (1978-07-01), Da Re
patent: 4105392 (1978-08-01), Arer et al.
patent: 4253817 (1981-03-01), Stinton et al.
patent: 4255104 (1981-03-01), Stinton
patent: 4290991 (1981-09-01), Thim
patent: 4378203 (1983-03-01), Nayagam

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